physics

NEVOD

NEVOD is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand NEVOD rather than just read about it. In short: NEVOD (Russian: НЕВОД, НЕйтринный ВОдный Детектор, Neutrino Water Detector; nevod means "dragnet" in Russian) is a neutrino detector and cosmic ray experiment that attempts to detect Cherenkov radiation arising from interactions between water and charged particles (mostly muons). It represents the first attempt to perform such measurements at the Earth's surface; it is because of this surface deployment that the exp…

Key takeaways

NEVOD belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NEVOD to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NEVOD from memory before moving on to harder problems.

Reference excerpt

NEVOD (Russian: НЕВОД, НЕйтринный ВОдный Детектор, Neutrino Water Detector; nevod means "dragnet" in Russian) is a neutrino detector and cosmic ray experiment that attempts to detect Cherenkov radiation arising from interactions between water and charged particles (mostly muons). It represents the first attempt to perform such measurements at the Earth's surface; it is because of this surface deployment that the experiment is also able to investigate cosmic rays. NEVOD is situated at the Moscow Engineering Physics Institute (MEPhI). The term NEVOD experimental complex is used of the experimental complex built around the original water Cherenkov detector for the study of cosmic rays; as of 2018, the experimental complex consists of: the Cherenkov water detector (the eponymous NEVOD detector), a coordinate-tracking detector DECOR, an array of scintillation detectors forming the calibration telescopes system CTS, and PRISMA array of thermal neutron detectors. As of 2018, the experimental complex is being expanded by three new cosmic ray detectors: NEVOD-EAS (for determination of cosmic ray air shower parameters), URAN (neutron detector) and TREK (drift chamber detector). Part of the new detectors are under operation (in 2018). The experimental complex used to also have a muon hodoscope URAGAN which was operational in 2016 and years prior. Current (2019) status of URAGAN is unknown.

Description As described by its inventors, NEVOD consists of a water reservoir measuring 9 m x 9 m x 26 m into which is placed a spatial lattice of quasi-spherical detector modules (QSMs) to record Cherenkov radiation from any direction. The dimensions of reservoir make it possible to arrange up to 241 QSMs. The quasi-spherical modules are, in fact, not spherical, but consist of an array of 6 photomultiplier tubes arranged along the primary axes of the device. The arrangement of the PMTs is such that the response of the PMT is dependent only on the intensity of the incident radiation, but not on its angle of incidence (over the limitation of angles viewable by the device), rendering the entire detector "quasi-spherical".

History NEVOD started operations in 1994 and was described in a journal in 1995, and has since been used both for primary research and for educational purposes. Since the start of NEVOD experiment's operation, many detectors have been added to the original Cherenkov detector, becoming the NEVOD experimental complex. Also the Cherenkov detector has been upgraded many times. One upgrade of the experimental complex was discussed in 2015-2016. As of 2018, the NEVOD experimental complex is operational.

References

External links NEVOD experiment record on INSPIRE-HEP

Illustrations

Worked examples

Example 1 — a first encounter with NEVOD

Start with the simplest possible case. Write down what NEVOD claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to NEVOD before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about NEVOD ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of NEVOD

In research: NEVOD appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses NEVOD in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: NEVOD is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in Moscow, Neutrino observatories, Particle experiments, so understanding it makes those chapters shorter.
In everyday life: Look for NEVOD outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study NEVOD in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NEVOD means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain NEVOD out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NEVOD in simple terms?

Why does NEVOD matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study NEVOD?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on NEVOD.